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. 2018 Feb 21;9:46. doi: 10.3389/fpsyt.2018.00046

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Copyright © 2018 Ma, Jiang, Fu, Fang, Wu, Liu, Xu and Wang.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Scatter plots showing significant correlations between network measures and neuropsychological variables in patients with PI. Effects of age, sex, and education were controlled during the correlation analyses. Thus, the fitted values (i.e., the observed network measures and neuropsychological variables minus the estimated effects of age, sex, and education) that are plotted reflect the “true” relationships. ISI, Insomnia Severity Index; ESS, Epworth Sleepiness Scale.